A listing of mathematics-related events for the public (say,
up to and including undergraduate-level). Note: only countries are present
for which an event has been listed - add your country to the list! Please contact me if you would
like an event included; I can't promise to include everything but I will
do my best. I cannot guarantee the accuracy of the information given –
please check the links given in case of updates or corrections.

Events which are online are available everywhere subject to internet restrictions and are listed under letter O.